Daikin Aurora Series Service Manual page 68

Protection Control
Heating
Pc > 3.31 MPa
(480 psi)
9-step down
After 10
Pc
seconds
Current step
maintained
Pc < 3.22 MPa
After 15
(467 psi)
seconds
3-step up
Pc
High pressure standby
(2 times within 40 minutes)
55
Normal Operation
Pc > 3.39 MPa
(492 psi)
> 3.31 MPa
(480 psi)
> 3.72 MPa (540 psi)
Pc < 3.17 MPa
(460 psi)
All units
Compressor step: 1
After 10
seconds
High pressure switch (4.0 MPa
(580 psi) ) is activated
Abnormal stop
(E3 is displayed)
SiUS341802E
Pc: High pressure sensor
detection value for master
unit
Functions and Control